Well the whole issue with Zack + Jessie was resolved at the end of the episode. The relationship with Lisa though was a bit unsettling. The episode ends with Lisa and Zack still wanting to have a relationship. I think the writers knew at that moment knew that Jessie and Kelly were going to leave the series and they wanted to add a new storyline they go on with for a couple of more episodes. I guess they thought It wouldnt work out and they decided to leave that idea all together and just add a new character. Just speaking my mind lol.
Yeah, that was very... open. I mean, yeah, it's a "kid's show", but that doesn't mean they can add a whole new story-line and then throw it out the window without even a second thought. Zack and Lisa had always been close and I personally might be a bit biased when saying that they should've pursued the relationship a bit more or at least given it a proper ending. But whatever I guess :P At least the actors really were in a relationship~
Yeah, I think that was weird how that was dropped after only one episode. I may be a Zack/Kelly fan, but Zack/Lisa should have at least dated for a few episodes. But that was a very confusing season because of Kelly and Jessie leaving the show and Tori coming on board.
I've always liked Zack/Kelly, but after seeing the Zack/Lisa relationship episode, I really started liking that relationship. Zack and Lisa had known each other since before high school. I think they should have gone steady.